Lower the （）ladder.

单项选择题The boat is （）to the water surface.

A.down
B.top
C.lower
D.up

单项选择题Ready for （）the boat.

A.lower
B.lowering
C.lowered
D.topped

单项选择题We are going to carry out an emergency （）.

A.practise
B.practice
C.drill
D.drills

单项选择题Throw a （）to the person overboard and help him come on board.

A.lifeboat
B.life-raft
C.lifebuoy
D.fire mask

单项选择题（）extinguish oil and electrical fires with water.

A.Do
B.Did
C.Never
D.Isn’t

单项选择题（） fire doors, windows, hatches, accesses and ventilators.

A.Closed
B.Close
C.Closing

单项选择题Inform the bridge and give the alarm at once （）the fire.

A. in case
B. case of
C. in case of
D. in the case of

单项选择题Fire and boat drills are carried out （）.

A.periodically
B.quarterly
C.monthly
D.yearly

单项选择题All the crew must know the locations as well as the （）of the life-saving and fire-fighting appliances.

A.operate
B.operating
C.operations
D.operated

单项选择题What kind of （）can be used for gas and chemical fires?

A.equipment
B.apparatus
C.extinguishers
D.machines